Bonasera's drink could have been just about anything. It could have been Grappa because Grappa is clear. But I don't see Grappa being something that Vito would keep close at hand.
So, what was it then? I don't think it's water, because the glass was too small for being a water glass. Also, I think that Don Corleone preferred Italian drinks. That's why I gues it could be grappa. But I'm not familiar with the drinking habits of Italian families in America, therefore I ask you guys.
